Cathedral of St John the Evangelist, Portsmouth

The Cathedral Church of St John the Evangelist (also known as St John's Cathedral) is a Roman Catholiccathedral in Portsmouth, England. It is the mother church of the Portsmouth diocese and seat of the Bishop of Portsmouth, currently the Right Reverend Philip Egan. It was dedicated on 10 August 1882.

The cathedral is one of two cathedral churches in the city, the other being the Church of EnglandCathedral Church of St Thomas which is located about one mile to the south.